package com.hissy.common.design.action.watcher;

/**
 * Created by zhangyanfei on 2019/4/10.
 *
 * @author zhangyanfei
 * @date 2019/04/10
 */
public interface Watched {
    void addWatcher(Watcher watcher);

    void removeWatcher(Watcher watcher);

    void notifyAllWacthers();
}
